Brass springring clasp has Screw-Tite Crimps on each end, adding a secure finishing touch to jewelry designs. Screw-Tite Crimps feature an economical combination of a screw finding and a crimp. These components contain a screw inside the barrel that crimps and holds wires in place. Can be loosened and retightened for adjusting ease. Crimp ends accommodate wire up to 0.02 inches (24 gauge). Spring mechanism is made of steel for added strength. Requires Screw-Tite Crimps screwdriver set to use.